 Accumulator maintenanceThe fo

 Accumulator maintenanceThe following needs to be checked:  check if the housing is damaged, check if the supports and rubbers are damaged, check if the seal of is still in place, and  check the nitrogen pressure (Chapter 5.4.3). If the pressure is to low one can refill the nitrogen through the coupling of Figure 7. Accumulator pressure checkThe correct procedure is explained below with reference to : isolate the accumulator from the system and reduce the liquid pressure to zero, remove the protective caps and sealing caps from the gas valve and the gas-fill valve, before mounting the equipment, ensure that knob A is unscrewed, that bleed valve B is closed and that non-return valve C is screwed tight, connect the unit to the gas-fill valve by means of the knurled nut D, and screw valve A to the point where pressure is registered.If the measured value corresponds to the prescribed value remove the equipment by: Unscrew nob A, Open bleed valve, and  Unscrew nut DThe maintenance of gas pre-charge has to be ensured. The first check has to be done within the first week after the start-up of the system. If there has not been noticed any leakage, the following check should be carried out after 3 months and afterwards every 6 months.